/**
 * Controller for power-operations
 *
 * @module app/serverControl
 * @exports powerOperationsController
 * @name powerOperationsController
 */

window.angular && (function(angular) {
  'use strict';

  angular.module('app.serverControl').controller('powerOperationsController', [
    '$scope', 'APIUtils', 'dataService', 'Constants', '$interval', '$q',
    'toastService',
    function(
        $scope, APIUtils, dataService, Constants, $interval, $q, toastService) {
      $scope.dataService = dataService;
      // Is a || of the other 4 "confirm" variables to ensure only
      // one confirm is shown at a time.
      $scope.confirm = false;
      $scope.confirmWarmReboot = false;
      $scope.confirmColdReboot = false;
      $scope.confirmOrderlyShutdown = false;
      $scope.confirmImmediateShutdown = false;
      $scope.loading = true;

      // When a power operation is in progress, set to true,
      // when a power operation completes (success/fail) set to false.
      // This property is used to show/hide the 'in progress' message
      // in markup.
      $scope.operationPending = false;

      /**
       * Checks the host status provided by the dataService using an
       * interval timer
       * @param {string} statusType : host status type to check for
       * @param {number} timeout : timeout limit, defaults to 5 minutes
       * @param {string} error : error message, defaults to 'Time out'
       * @returns {Promise} : returns a deferred promise that will be fulfilled
       * if the status is met or be rejected if the timeout is reached
       */
      var checkHostStatus =
          (statusType, timeout = 300000, error = 'Time out.') => {
            const deferred = $q.defer();
            const start = new Date();
            const checkHostStatusInverval = $interval(() => {
              let now = new Date();
              let timePassed = now.getTime() - start.getTime();
              if (timePassed > timeout) {
                deferred.reject(error);
                $interval.cancel(checkHostStatusInverval);
              }
              if (dataService.server_state === statusType) {
                deferred.resolve();
                $interval.cancel(checkHostStatusInverval);
              }
            }, Constants.POLL_INTERVALS.POWER_OP);
            return deferred.promise;
          };

      APIUtils.getLastPowerTime()
          .then(
              function(data) {
                if (data.data == 0) {
                  $scope.powerTime = 'not available';
                } else {
                  $scope.powerTime = data.data;
                }
              },
              function(error) {
                console.log(JSON.stringify(error));
              })
          .finally(function() {
            $scope.loading = false;
          });

      $scope.toggleState = function() {
        dataService.server_state =
            (dataService.server_state == 'Running') ? 'Off' : 'Running';
      };

      /**
       * Initiate Power on
       */
      $scope.powerOn = () => {
        $scope.operationPending = true;
        dataService.setUnreachableState();
        APIUtils.hostPowerOn()
            .then(() => {
              // Check for on state
              return checkHostStatus(
                  Constants.HOST_STATE_TEXT.on, Constants.TIMEOUT.HOST_ON,
                  Constants.MESSAGES.POLL.HOST_ON_TIMEOUT);
            })
            .catch((error) => {
              console.log(error);
              toastService.error(Constants.MESSAGES.POWER_OP.POWER_ON_FAILED);
            })
            .finally(() => {
              $scope.operationPending = false;
            })
      };

      /**
       * Initiate Orderly reboot
       * Attempts to stop all software
       */
      $scope.warmReboot = () => {
        $scope.operationPending = true;
        dataService.setUnreachableState();
        APIUtils.hostReboot()
            .then(() => {
              // Check for off state
              return checkHostStatus(
                  Constants.HOST_STATE_TEXT.off, Constants.TIMEOUT.HOST_OFF,
                  Constants.MESSAGES.POLL.HOST_OFF_TIMEOUT);
            })
            .then(() => {
              // Check for on state
              return checkHostStatus(
                  Constants.HOST_STATE_TEXT.on, Constants.TIMEOUT.HOST_ON,
                  Constants.MESSAGES.POLL.HOST_ON_TIMEOUT);
            })
            .catch((error) => {
              console.log(error);
              toastService.error(
                  Constants.MESSAGES.POWER_OP.WARM_REBOOT_FAILED);
            })
            .finally(() => {
              $scope.operationPending = false;
            })
      };

      $scope.warmRebootConfirm = function() {
        if ($scope.confirm) {
          // If another "confirm" is already shown return
          return;
        }
        $scope.confirm = true;
        $scope.confirmWarmReboot = true;
      };

      /**
       * Initiate Immediate reboot
       * Does not attempt to stop all software
       */
      $scope.coldReboot = () => {
        $scope.operationPending = true;
        dataService.setUnreachableState();
        APIUtils.chassisPowerOff()
            .then(() => {
              // Check for off state
              return checkHostStatus(
                  Constants.HOST_STATE_TEXT.off,
                  Constants.TIMEOUT.HOST_OFF_IMMEDIATE,
                  Constants.MESSAGES.POLL.HOST_OFF_TIMEOUT);
            })
            .then(() => {
              return APIUtils.hostPowerOn();
            })
            .then(() => {
              // Check for on state
              return checkHostStatus(
                  Constants.HOST_STATE_TEXT.on, Constants.TIMEOUT.HOST_ON,
                  Constants.MESSAGES.POLL.HOST_ON_TIMEOUT);
            })
            .catch((error) => {
              console.log(error);
              toastService.error(
                  Constants.MESSAGES.POWER_OP.COLD_REBOOT_FAILED);
            })
            .finally(() => {
              $scope.operationPending = false;
            })
      };

      $scope.coldRebootConfirm = function() {
        if ($scope.confirm) {
          return;
        }
        $scope.confirm = true;
        $scope.confirmColdReboot = true;
      };

      /**
       * Initiate Orderly shutdown
       * Attempts to stop all software
       */
      $scope.orderlyShutdown = () => {
        $scope.operationPending = true;
        dataService.setUnreachableState();
        APIUtils.hostPowerOff()
            .then(() => {
              // Check for off state
              return checkHostStatus(
                  Constants.HOST_STATE_TEXT.off, Constants.TIMEOUT.HOST_OFF,
                  Constants.MESSAGES.POLL.HOST_OFF_TIMEOUT);
            })
            .catch((error) => {
              console.log(error);
              toastService.error(
                  Constants.MESSAGES.POWER_OP.ORDERLY_SHUTDOWN_FAILED);
            })
            .finally(() => {
              $scope.operationPending = false;
            })
      };

      $scope.orderlyShutdownConfirm = function() {
        if ($scope.confirm) {
          return;
        }
        $scope.confirm = true;
        $scope.confirmOrderlyShutdown = true;
      };

      /**
       * Initiate Immediate shutdown
       * Does not attempt to stop all software
       */
      $scope.immediateShutdown = () => {
        $scope.operationPending = true;
        dataService.setUnreachableState();
        APIUtils.chassisPowerOff()
            .then(() => {
              // Check for off state
              return checkHostStatus(
                  Constants.HOST_STATE_TEXT.off,
                  Constants.TIMEOUT.HOST_OFF_IMMEDIATE,
                  Constants.MESSAGES.POLL.HOST_OFF_TIMEOUT);
            })
            .then(() => {
              dataService.setPowerOffState();
            })
            .catch((error) => {
              console.log(error);
              toastService.error(
                  Constants.MESSAGES.POWER_OP.IMMEDIATE_SHUTDOWN_FAILED);
            })
            .finally(() => {
              $scope.operationPending = false;
            })
      };

      $scope.immediateShutdownConfirm = function() {
        if ($scope.confirm) {
          return;
        }
        $scope.confirm = true;
        $scope.confirmImmediateShutdown = true;
      };
    }
  ]);
})(angular);